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Inglés nivel C1 ; Space and Universe 1. Key Vocabulary Vocabulary Meaning Galaxy A massive system of stars, gas, and dust bound together by gravity. Nebula A cloud of gas and dust in space where stars are often formed. Black hole A region in space with gravitational pull so strong that nothing can escape. Orbit The curved path of an object around a star, planet, or moon. Asteroid A small rocky body orbiting the sun. Comet An icy celestial object that releases gas and dust, forming a tail. Light